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Used Mic Noisy Signal "Wind Noise" Rumble

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Used Mic Noisy Signal "Wind Noise" Rumble

Postby Rjg236 » Mon Oct 12, 2020 9:45 pm

Good forum. I’ve been learning a lot. I’m a live musician, just finished recording my first album in a real studio this summer and I’m setting up a little home recording studio for songwriting and recording at home. I have a couple of PA’s and am familiar with live gear and sound. In the past I have used Zoom and Tascam portables for recording at home. This weekend I picked up a used Rode NT2-A microphone and upon setup I immediately heard a loud rumble sound similar to wind noise through the monitors. I swapped XLR cables but no change. I plugged in one of my Audix OM-2 dynamic mics with phantom power turned off and the signal was perfectly clean. Then I tried an old MXR 990 I had in a case on the shelf and it's shotgun accessory 991 mic. The 990 made the same sound as the NT2-A. The 991 shotgun was clear as a bell. Then I decided to try the Rode into my Tascam DR-44WL as an interface direct into headphones. Same Noise. So by process of elimination is it likely I have two damp capsules in two large diaphragm condenser mics? I’m stumped.

My setup is a Behringer UMC404HD interface into Reaper on Windows - JBL 305P MkII monitors, Audio Technica AT5050 cans

Thanks for your help in advance.
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Re: Used Mic Noisy Signal "Wind Noise" Rumble

Postby Hugh Robjohns » Mon Oct 12, 2020 9:52 pm

Rjg236 wrote:So by process of elimination is it likely I have two damp capsules in two large diaphragm condenser mics?

Yes, I fear so.

The noises could also be due to failing or contaminated impedance converter circuitry, but damp and/or contaminated capsules are the most likely.

Place the mic, capsule first, in an unsealed plastic (freezer-style) bag (to keep dust out) and place in a warm, dry environment (like an airing cupboard) for 48-72 hours. Then y again to see if the noises have gone.
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